oil equipotential surface

同义词释义

1)oil equipotential surface,油等势面2)oil isopotential surface,油等势面3)fuel grade,燃油等级4)oil grade,油等级5)cd oil level,cd机油等级6)feed head,馈给(水、油等)压头7)oil step,油等级，油压分段8)crankcase oil types,曲轴箱润滑油等级9)black oil,原油、重油等的总称10)recommended oil grade,推荐的润滑油等级